The strength of the EWPT is measured according to the order parameter \(v_c/T_c\) ,
where \(v_c\equiv v(T_c)\)  is the VEV of SM-like Higgs boson at the critical temperature. For a successful baryogenesis,
the first-order EWPT should be strong enough so that the sphaleron process in the broken phase is sufficiently suppressed to avoid baryon asymmetry washout [1]}.
This gives the conventional criterion for a sufficiently strong EWPT:
\(\frac{v_c}{T_c}\gtrsim \zeta ,\) 
